Dynamic Characteristics of Hard Disk Drive Spindle Motors—Comparison Between Ball Bearings and Hydrodynamic Bearings-Reference-Cited by-同舟云学术

Dynamic Characteristics of Hard Disk Drive Spindle Motors—Comparison Between Ball Bearings and Hydrodynamic Bearings

Published:1996-04-01 Issue:2 Volume:118 Page:402-406
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Ku C.-P. Roger¹

Affiliation:

1. Conner Peripherals, Motor Development Department, 2720 Orchard Parkway, MS 3311, San Jose, CA 95134

Abstract

Recently, many computer hard disk drive companies and spindle motor manufacturers have been looking for a substitute for ball bearings to continue making dramatic progress in increasing the capacity of data storage systems. In this paper, the frequency-forced responses of hard disk drive spindle motors supported by both ball bearings and liquid-lubricated spiral groove hearings (SGBs) were studied experimentally. It is found that both shaft rigidity and disk flexibility have great effects on the natural frequency of the spindle motor conical (rocking) mode. The high damping capacity of the SGB is able to suppress the vibration amplitudes of both motor rocking mode and the flexible disk modes. But at a very low frequency range, the SGB motors displayed a large amplitude in the axial direction vibration test. With an adequate bearing design, the SGB motors have proven their superior dynamic characteristics.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/118/2/402/5938228/402_1.pdf

Reference9 articles.

1. Bouchard G. , LauL., and TalkeF. E., 1987, “An Investigation of Nonrepeatable Spindle Run-Out,” IEEE Trans. on Magnetics, Vol. 23, No. 5, pp. 3687–3689.

2. Futamoto M. , KugiyaP., SuzukiM., TakanoH., MatsudaY., InabaN., MiyamuraY., AkagiK., NakaoT., and SawaguchiH., 1991, “Investigation of 2 Gb/in2 Magnetic Recording at a Track Density of 17 kTPI,” IEEE Trans. on Magnetics, Vol. 27, No. 6, pp. 5280–5285.

3. Ku, C.-P. R., 1995, “Dynamic Characteristics of Spindle Motors Supported by Hydrodynamic Bearings,” proceeding of the 24th Incremental Motion Control System & Devices Conference, June 6–8, San Jose, CA, pp. 223–dash;232.

4. Ku, R. C.-P., & Shen, I. Y., 1995, “Effect of Disk Flexibility on Natural Frequencies in Computer Hard Disk Drive Spindle Motors” accepted to be published by STLE Tribology Transaction and present at STLE/ASME Joint Tribology Conference, Kissimmee, FL, Oct. 8–11.

5. Lee, C. C., Tecza, J. A., Walowit, J. A., Pinkus, O., and Zorzi, E. S., 1988, “FEATURE: Finite Element Analysis Tool for Utility Rotordynamic Evaluation,” Mechanical Technology Incorporated, 88TM7, Latham, New York.

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